Year	Index
1980	1.215
1981	1.32
1982	1.711
1983	2.213
1984	2.772
1985	3.298
1986	5.596
1987	7.121
1988	8.663
1989	10.597
1990	12.428
1991	15.654
1992	19.759
1993	19.891
1994	20.169
1995	21.355
1996	21.414
1997	21.776
1998	22.772
1999	23.599
2000	24.402
2001	24.772
2002	25.216
2003	29.602
2004	34.436
2005	48.823
2006	63.022
2007	71.807
2008	83.796
2009	85.641
2010	100.118
2011	108.998
2012	117.556
2013	126.827
2014	130.32
2015	134.014
2016	143.571
2017	158.567
2018	173.945
2019	189.173
2020	204.534
2021	220.975
2022	238.437
2023	257.001
2024	277.005